一周中的第几天

/*
 * This solution uses the LocalDate class from java.time package to determine the day of the week.
 * We create an instance of LocalDate using the provided day, month, and year.
 * We then use the getDayOfWeek() method to retrieve the day of the week, which returns a DayOfWeek enum.
 * We convert this to a string and return it.
 */

import java.time.LocalDate;
import java.time.DayOfWeek;

public class DayOfWeekFinderStream {
    public static String findDayOfWeek(int day, int month, int year) {
        // Create a LocalDate instance
        LocalDate date = LocalDate.of(year, month, day);
        // Retrieve the day of the week
        DayOfWeek dayOfWeek = date.getDayOfWeek();
        // Return the day of the week as a string
        return dayOfWeek.toString();
    }

    public static void main(String[] args) {
        System.out.println(findDayOfWeek(31, 8, 2019)); // Output: SATURDAY
        System.out.println(findDayOfWeek(18, 7, 1999)); // Output: SUNDAY
        System.out.println(findDayOfWeek(15, 8, 1993)); // Output: SUNDAY
    }
}